1, Ginkgo biloba
Ginkgo tree, also known as ginkgo tree, was called duck foot tree or gongsun tree in ancient times. As early as 270 million years ago, the ancestors of Ginkgo biloba began to appear, and compared with ferns all over the world at that time, it was still a higher plant.
2. Metasequoia glyptostroboides
Metasequoia is a deciduous conifer. One of the rare plants with beautiful tree posture, lush foliage and changeable leaf color is a national first-class protected plant.
3.Davidia involucrata
Davidia involucrata can grow to the height of 15-25m, with wide oval leaves and jagged edges. There is only one genus and two species of undergraduate plants. The two species are very similar, but the leaves of one species are hairy and the leaves of the other species are smooth.
These colorful flowers are very wonderful, and they are plants left over from the Cenozoic tertiary 6.5438+million years ago. During the Quaternary Glacier Period, Davidia involucrata died out in most areas, and only parts of southern China survived. Luoyang Lucheng agriculture has been successfully propagated and planted on a large scale.
4. Fragrant fruit trees
Emmenopteris a deciduous tree belonging to the genus Emmenopteris of Rubiaceae, with a height of 30 meters and a gray-brown bark with scales. Branchlets are stout and lenticellate, leaves are papery or leathery, leaves are broadly elliptic, broadly ovoid or ovoid, the upper part is hairless or sparsely strigose, the lower part is pale, the stipules are large, triangular and ovoid, and conical cymes are terminal.
Extended data
Ginkgo biloba is born in a natural forest with an altitude of 500- 1000 meters, acidic yellow soil (pH 5-5.5) and good drainage, and is often mixed with coniferous and broad-leaved trees such as Cryptomeria fortunei, Torreya grandis and Orchidaceae, and grows vigorously. Ginkgo biloba is a light-loving tree with deep roots and wide adaptability to climate and soil. It can also grow in areas with high temperature and rainy, scarce rainfall and cold winter, but the growth is slow or poor.
It can grow on acidic soil, calcareous soil and neutral soil, but it is not tolerant to saline-alkali and over-wet soil. Born below 1000 meters above sea level, the climate is warm and humid, the annual precipitation is 700- 1500 mm, the soil layer is deep, fertile and humid, and the areas with good drainage grow best. Peace * * * is where the soil is barren and dry and the rocky slopes are excessively wet, and it does not survive late or grow poorly.
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